Niall Matter
Niall is well known for his lead roles in Primeval New World and his recurring role on Eureka but he also appeared twice on Stargate Atlantis as Lt Kemp, played Tag Cummins on Arctic Air and guest starred on Motive. IMDBTwitterOfficialWilliam Russ
William played the rogue SG1 captain Jonas Hanson in the Stargate first season episode The First Commandment and also had a long running lead role in Boy Meets world and guest starred on Boston Legal, Vegas and Wildfire. IMDBGeorge Wyner
George guest starred as Al Martell in the SG1 episode Prometheus and has had guest spots on House, The Mentalist, ER, Melissa & Joey and Desperate Housewives. IMDB